From be038f9cb2d4302d74c0edadd9abf2b282adc7c3 Mon Sep 17 00:00:00 2001
From: Dan McGee <dan@archlinux.org>
Date: Wed, 18 Jan 2012 21:43:00 -0600
Subject: Remove rmrf implementation from backend

This moves the code for removal of local database entries right into
be_local.c, which was the last user of the rmrf() function we had in our
utility source file. We can simplify the implementation and make it
non-recursive as we know the structure of the local database entries.

Signed-off-by: Dan McGee <dan@archlinux.org>
---
 lib/libalpm/be_local.c | 40 +++++++++++++++++++++++++++++++++++-----
 lib/libalpm/util.c     | 46 ----------------------------------------------
 lib/libalpm/util.h     |  2 +-
 3 files changed, 36 insertions(+), 52 deletions(-)

diff --git a/lib/libalpm/be_local.c b/lib/libalpm/be_local.c
index 36b2c5dc..137da1a8 100644
--- a/lib/libalpm/be_local.c
+++ b/lib/libalpm/be_local.c
@@ -907,14 +907,44 @@ cleanup:
 int _alpm_local_db_remove(alpm_db_t *db, alpm_pkg_t *info)
 {
 	int ret = 0;
-	char *pkgpath = _alpm_local_db_pkgpath(db, info, NULL);
+	DIR *dirp;
+	struct dirent *dp;
+	char *pkgpath;
+	size_t pkgpath_len;
 
-	/* TODO explicit file removes and then an rmdir? */
-	ret = _alpm_rmrf(pkgpath);
-	free(pkgpath);
-	if(ret != 0) {
+	pkgpath = _alpm_local_db_pkgpath(db, info, NULL);
+	if(!pkgpath) {
+		return -1;
+	}
+	pkgpath_len = strlen(pkgpath);
+
+	dirp = opendir(pkgpath);
+	if(!dirp) {
+		return -1;
+	}
+	/* go through the local DB entry, removing the files within, which we know
+	 * are not nested directories of any kind. */
+	for(dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) {
+		if(strcmp(dp->d_name, "..") != 0 && strcmp(dp->d_name, ".") != 0) {
+			char name[PATH_MAX];
+			if(pkgpath_len + strlen(dp->d_name) + 2 > PATH_MAX) {
+				/* file path is too long to remove, hmm. */
+				ret = -1;
+			} else {
+				sprintf(name, "%s/%s", pkgpath, dp->d_name);
+				if(unlink(name)) {
+					ret = -1;
+				}
+			}
+		}
+	}
+	closedir(dirp);
+
+	/* after removing all enclosed files, we can remove the directory itself. */
+	if(rmdir(pkgpath)) {
 		ret = -1;
 	}
+	free(pkgpath);
 	return ret;
 }
 
diff --git a/lib/libalpm/util.c b/lib/libalpm/util.c
index 3cc4bbf7..24bf1fc0 100644
--- a/lib/libalpm/util.c
+++ b/lib/libalpm/util.c
@@ -397,52 +397,6 @@ cleanup:
 	return ret;
 }
 
-/** Recursively removes a path similar to 'rm -rf'.
- * @param path path to remove
- * @return 0 on success, number of paths that could not be removed on error
- */
-int _alpm_rmrf(const char *path)
-{
-	int errflag = 0;
-	struct dirent *dp;
-	DIR *dirp;
-	struct stat st;
-
-	if(_alpm_lstat(path, &st) == 0) {
-		if(!S_ISDIR(st.st_mode)) {
-			if(!unlink(path)) {
-				return 0;
-			} else {
-				if(errno == ENOENT) {
-					return 0;
-				} else {
-					return 1;
-				}
-			}
-		} else {
-			dirp = opendir(path);
-			if(!dirp) {
-				return 1;
-			}
-			for(dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) {
-				if(dp->d_name) {
-					if(strcmp(dp->d_name, "..") != 0 && strcmp(dp->d_name, ".") != 0) {
-						char name[PATH_MAX];
-						sprintf(name, "%s/%s", path, dp->d_name);
-						errflag += _alpm_rmrf(name);
-					}
-				}
-			}
-			closedir(dirp);
-			if(rmdir(path)) {
-				errflag++;
-			}
-		}
-		return errflag;
-	}
-	return 0;
-}
-
 /** Determine if there are files in a directory.
  * @param handle the context handle
  * @param path the full absolute directory path
diff --git a/lib/libalpm/util.h b/lib/libalpm/util.h
index 6d5c0c35..d5cf0127 100644
--- a/lib/libalpm/util.h
+++ b/lib/libalpm/util.h
@@ -121,7 +121,7 @@ int _alpm_unpack_single(alpm_handle_t *handle, const char *archive,
 		const char *prefix, const char *filename);
 int _alpm_unpack(alpm_handle_t *handle, const char *archive, const char *prefix,
 		alpm_list_t *list, int breakfirst);
-int _alpm_rmrf(const char *path);
+
 ssize_t _alpm_files_in_directory(alpm_handle_t *handle, const char *path, int full_count);
 int _alpm_logaction(alpm_handle_t *handle, const char *fmt, va_list args);
 int _alpm_run_chroot(alpm_handle_t *handle, const char *cmd, char *const argv[]);
-- 
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